20 Most Recent Samsung HCL4715W 47" Rear Projection Television - Page 7 Questions & Answers


Many times, the only problem is hte transistor itself. There is really no way to determine whether or not additiona parts are required until the known defective one is replaced. If there are other symptoms once the transistor is replaced, post them here and we'll guide you to the defective parts.

Dan

Samsung HCL4715W... | Answered on Feb 09, 2009


IGBTs do not work well at high frequencies. They are not very linear, either. Even if it works, you'll likely wind up with a compressed and distorted picture.

Just put in an equivalent output transistor and call it a day.

Peace.

Marco

Samsung HCL4715W... | Answered on Feb 04, 2009


Yes the puddle is related to the Blue CRT coolant leaking. You are most likely going to need a new Blue CRT drive circuit board and quite possibly a new Blue CRT if the CRT got too hot from not haveing a sufficent supply of coolant. You can get replacement CRT drives and CRts at the following link.
http://servicemanuals.vstore.ca/

Samsung HCL4715W... | Answered on Jan 26, 2009


you can test the Is for having the proper incoming voltages and then checking to see if they have the correct output voltages. You willnee the service manual with schematics to be able to test all the voltages for the pins on both ICs. Do you have the servicemaual? If not you can get one at the following link they email them or provide download link depending on the size o the manuals
http://servicemanuals.vstore.ca/

Samsung HCL4715W... | Answered on Jan 23, 2009


it can be the loose connection on circuit board .can you resold the all pcb joints.
i will hlp you.or give it to service proffesional.
nuwan.

Samsung HCL4715W... | Answered on Jan 19, 2009


The tv plays fine my sreen is cracked on my Sony 42inch screen can some one help me.

Samsung HCL4715W... | Answered on Jan 19, 2009


have a repairman check this the tech infor for repair is:
In rush Limiting Resistor location R8010 its comen for this model to open the resistor
its on the power supply module value is 6.8ohms at 7 watt standup cement Style resistor.

I think this will do it.
thanks,
daniel.

Samsung HCL4715W... | Answered on Jan 13, 2009


Only If they are burted up,and no you should be able to use your heat Sinks.Rember to CK low ohm resistors samsung has 3 that can and do go bad. 2.7 or 3.9ohms

Samsung HCL4715W... | Answered on Jan 09, 2009


As long as you do not accidently solder wrong connections together you should be OK. Make sure all solder is to same circuit.

Samsung HCL4715W... | Answered on Jan 09, 2009


ok give me the name of you motherboard and i will find a website for you. if you dnt know how to do that reply back asking how.

Samsung HCL4715W... | Answered on Jan 01, 2009


You dont need a new tube. What you need is to repair the seal on your old tube and replace the CRT coolant fluid. There is a coolant chamber attached to the tube with long bolts with springs on them that contains coolant to prevent your tubes from getting hot. Yours may just need tightening, but I would replace the seal just to be safe as thecoolant can and will destroy your circuit board if its allowed to continue to leak on it.

Samsung HCL4715W... | Answered on Dec 23, 2008


I had a similar problem on our 61" LED projection Samsung, It was about 9 months old, I called in the engineer (It was still under warrenty.), he updated the firmware on the TV. He connected his laptop to the TV, went on to Samsung,s internet site, downloaded and installed the latest update. We have had no problems since.
I hope this helps you.

Samsung HCL4715W... | Answered on Dec 22, 2008


The focus controls on this set are in the front behind the bezel.
I'm not sure, but, I think on this age of Samsung, the screws to the front bezel are on the back side of the set. After removing the screws from the back, the front bezel snaps off and the door behind the bezel need to be removed. Watch the wires connected to the bezel, they need to be attached in order to turn on the set.
The focus controls are on a black control block (there are three of them, one for each color). Adjust each color for sharpest picture. I use words on the screen for alignment.
Each CRT board has a screen control (Adjust each slowly until retrace lines appear on the screen and then back off until they disappear). You may turn off the color and make sure that the picture is black and white. If it is not, then, which ever color is dominant, back it off a bit with that screen control.
Facing the set, Red is left, Green is middle and Blue is on the right.
Use only one hand inside an operating television. Do not touch the board, just the controls.
This concludes television alignment 101.
Any questions respond to this post and I'll reply.

Samsung HCL4715W... | Answered on Dec 22, 2008


Call the following number to know part price, availability, and delivery cost: 1-866-925-PART (7278)

Samsung HCL4715W... | Answered on Dec 22, 2008


more than likley it is your proscan board.

Samsung HCL4715W... | Answered on Dec 10, 2008


You have convergence problems replace both of the STKs big black ics.

Samsung HCL4715W... | Answered on Dec 09, 2008


IF THE SCREEN IS ALL RED WITH VIDEO VISIBLE AND RETRACE LINES. ADJUST SCREEN CONTROL IN THE FRONT FOR THE RED TUBE ONLY. TURN CONTROL COUNTER CLOCKWISE. IF THAT DOESNT DO IT THE TUBE CAN BE REJUVINATED.

Samsung HCL4715W... | Answered on Dec 09, 2008


maybe you can have someone send the parts you need and maybe you can find your model and chassi number here for the schematic
http://www.eserviceinfo.com/equipment_mfg/Samsung_2.html
but it sounds like you will need convergence IC's to fix the color alignment , but some bad resistor or resistors will most likely be involved

here is an example of the convergence IC's
http://www.nteinc.com/specs/7100to7199/pdf/nte7178_81.pdf
and they can be ordered from an electronic parts supply store

Samsung HCL4715W... | Answered on Dec 01, 2008

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